You're sound as can be, you and your grandfather. Everyone is listening and searching, one way or another. I admire people who have figured life's mysteries with greater certainty than I have. The most penetrating quote I can bring to this is from the great Canadian critic and writer Northrop Frye:

"The knowledge that you can have is inexhaustible, and what is inexhaustible is benevolent. The knowledge you cannot have is of the riddles of birth and death, of our future destiny and the purposes of God. Here there is no knowledge, but illusions that restrict freedom and hope. Accept the mysteries behind knowledge: It is not darkness but shadow."

Frye's The Great Code is considered one of the most provocative books ever written about the Bible---lots about voices. "No one has set forth so clearly, so subtly, or with such cogent energy as Frye the literary aspect of our biblical heritage," said the The New York Times Book Review. Viking. Published 1990.